EP0289640A1 - Seaming machines, especially for seaming dewatering and dry screens, felts and the like - Google Patents

Seaming machines, especially for seaming dewatering and dry screens, felts and the like Download PDF

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Publication number
EP0289640A1
EP0289640A1 EP87106666A EP87106666A EP0289640A1 EP 0289640 A1 EP0289640 A1 EP 0289640A1 EP 87106666 A EP87106666 A EP 87106666A EP 87106666 A EP87106666 A EP 87106666A EP 0289640 A1 EP0289640 A1 EP 0289640A1
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EP
European Patent Office
Prior art keywords
thread
hooks
separator according
needles
row
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87106666A
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German (de)
French (fr)
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EP0289640B1 (en
Inventor
Bernhard Dr. Krenkel
Fritz Vöhringer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cessione wis Engineering GmbH
Original Assignee
F Oberdorfer & Co KG Industriegewebe-Technik GmbH
F Oberdorfer & Co KG Industriegewebe-Technik GmbH
OBERDORFER FA F
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by F Oberdorfer & Co KG Industriegewebe-Technik GmbH, F Oberdorfer & Co KG Industriegewebe-Technik GmbH, OBERDORFER FA F filed Critical F Oberdorfer & Co KG Industriegewebe-Technik GmbH
Priority to ES198787106666T priority Critical patent/ES2025577T3/en
Priority to AT87106666T priority patent/ATE68024T1/en
Priority to DE8787106666T priority patent/DE3773487D1/en
Priority to EP87106666A priority patent/EP0289640B1/en
Publication of EP0289640A1 publication Critical patent/EP0289640A1/en
Application granted granted Critical
Publication of EP0289640B1 publication Critical patent/EP0289640B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0054—Seams thereof

Definitions

  • the invention relates to a thread separator for sewing machines, in particular for sewing drainage fabrics, dryer fabrics, felting and the like.
  • a separator head in a to the plane of the row to be separated threads of the screen fabric substantially perpendicular plane which is movable in this plane and can be pushed against the thread row, with a leg behind the thread row of the separator head, which has an inlet gap for the thread row has and with a in the separating head by a controllable drive with respect to the thread row in a guide groove displaceable needle.
  • Known thread separators of this type are required for separating threads in the seam formation for closing open woven fabric webs by means of an auxiliary chain, the warp thread ends of the fabric web held on both sides of the auxiliary chain being detected and alternately in from both sides the subject formed in the auxiliary chain are introduced.
  • Automation of the entire seam formation process presupposes that this process runs smoothly insofar as the thread separator always separates the warp thread ends only one thread is gripped and severed from the row of threads, and not several, whereby this grasping must also exclude with certainty that the thread to be separated is impaled by the thread separator.
  • the known thread separator fulfills these requirements only inadequately, so that the object of the invention is to optimize the functional reliability of the thread separator in that the hook needles are designed in such a way that a separation of the foremost thread in each case of a line of longitudinal thread ends of a fabric is achieved and all Piercing and taking away the following thread is avoided.
  • the hook needles are designed as compartment needles, which are provided with hooks, of which at least two with respect to the top and the bottom of the fabric associated with the row of threads are opposite each other in the same plane or parallel planes, the tips of which each opposite thread surface are directed and their concave recesses are shaped to match the diameter and shape of the individual threads to be picked up in such a way that piercing of the thread to be separated by the tips and taking away the following thread can be avoided.
  • This construction ensures that with the aid of a hook system consisting of at least two opposing hooks of the compartment needles, each matched to the threads to be separated, depending on the control, coming from the running side or paper side direction, the foremost warp thread of a row of threads is gripped and separated, whereby one of the hooks is responsible for a particular type of thread and / or one side of the fabric.
  • the thread separator shown in Fig. 1 is known. It differs from the thread separator according to the invention shown in FIG. 2 essentially only with regard to the single looper needle with only one hook, so that the same reference numerals are used for the corresponding parts of the thread separator of further embodiments.
  • the thread separator 1 has a separator head 2, which is arranged in a thread 13 (FIGS. 3 and 4) which is to be separated from one another to the plane of a row 9, that is to say to be separated, in a substantially vertical plane and can be displaced in this plane against the thread row.
  • the separating head 2 there is at least one gripper needle which can be displaced by a controllable drive with respect to the thread row and which is movable in a groove 3 in the separating head and acted upon by a leaf spring 16 and which is designed as a section needle 4 provided with at least one hook 6, 7.
  • the compartment needle or compartment needles have at least two hooks 6, 7 opposite each other in the same plane with respect to the top 5 and bottom 8 of the fabric strip or magazine bundle belonging to the thread row 9, the tips 10, 11 of which are directed towards the respective opposite thread surface 12.
  • the hooks 6, 7 are each provided with a concave recess 14, 15, which - as can be seen from FIGS. 2, 3 and 4 - advantageously lie in a compartment needle.
  • These concave recesses have a radius of curvature which corresponds to the curvature of the surface 12 of the thread 13, and can therefore also be curved differently to adapt to the diameter of the thread 13 to be picked up during separation.
  • the length of the arc of curvature of the concave recesses 14, 15 of the hooks 6, 7 corresponds to approximately half the thread circumference in the case of a circular thread cross section, as shown in FIGS. 3 and 4.
  • the shape of the hooks 6, 7 is selected so that piercing of the thread 13 to be separated by the respective tip 10, 11 and entrainment of the follower thread 18 are avoided.
  • the mutual spacing of the tips 10, 11 of the hooks 6, 7 is selected as shown in FIG. 2 that it corresponds approximately to the width (a) of the inlet gap 17 in the separating head 2 for the thread row 9.
  • This inlet gap width is adapted to the fabric thickness and is approximately between 0.5 and 3 mm, a width of 1.0 mm having proven to be particularly advantageous.
  • a narrow guide groove in the separator head without rounded edges is advantageous for optimal functioning of the thread separator, so that with appropriate adjustment of the configuration of the hooks or compartment needles, the guide groove and the inlet gap width, a tension adjustment of the fabric strip is unnecessary, by which to ensure the desired functional reliability of the thread separator, ie to avoid piercing and taking along the subsequent thread 18 when separating the thread 13 with certainty.
  • a tension adjustment of the fabric strip is unnecessary, by which to ensure the desired functional reliability of the thread separator, ie to avoid piercing and taking along the subsequent thread 18 when separating the thread 13 with certainty.
  • a e.g. compartment needle with a double hook inside the thread separator prevents weaving errors in the seam by simultaneously twisting two threads.
  • FIGS. 5 to 7 schematically show, using a partial side view of a compartment needle 4 according to the invention with its double hook, the manner in which the needle separates the threads in different types of fabric.
  • the two hooks of the needle marked in FIGS. 2 to 4 with 6 and 7 but not shown in FIGS. 5 to 7 are adapted in size to the respective warp thread diameters and take this depending on Control from the leading side and paper side direction of the front warp thread to separate it.
  • the compartment needles 4 are controlled via a programmed cam disc in the program switching mechanism or, in the case of jacquard seams, via program needles and the correspondingly programmed jacquard card.
  • the digits 1 to 7 (Fig. 5), 1 to 10 (Fig. 6) and 1 to 9 (Fig. 7) and their page assignment show the order and the page affiliation of the taps made by the hooks.
  • the left or lower hook of the section needle 4 is required to separate the warp threads 2, 3, 5 and 7 on the paper side of the fabric, while the right, upper hook of the section needle the warp threads 1 , 4 and 6 isolated on the running side of the fabric.
  • the so-called F-23 fabric the second and third warp threads on the paper side are consecutive and all others are alternately picked up or tapped alternately between the running side and the paper side.
  • the mode of operation of the thread separator according to the invention or the compartment needle 4 with double hook used in separating threads of a composite fabric is shown in FIG. 6.
  • the paper side and the running side of the fabric are picked up alternately by the lower and upper hook.
  • FIG. 6 For another composite fabric, as can be seen from FIG.
  • the warp threads are separated in alternation between paper side, paper side and running side of the fabric, working with a small hook for the paper side and a large hook for the running side, as from the different diameters the threads of the paper side and the running side shown in section and also from the different hook sizes of the double hook of this compartment needle can be seen.
  • the construction according to the invention also has the advantage that the dividing needle 4 fits into any standard thread separator or that each such thread separator can be retrofitted with little effort in this regard.
  • the functional improvement not only means that the simultaneous separation of two successive threads is avoided, but also that the setting of the thread separator is simplified.
  • the separator head For many fabrics, it is sufficient to work with a single section needle in the separator head, the opposite hooks of which are shaped depending on the fabric. In the case of fabrics with several types of longitudinal thread of different thicknesses, however, it may be necessary to arrange a plurality of section needles one above the other in the guide groove of the separating head, each needle being individually movable and, according to a control program, dividing the threads of the thread types assigned to them. As shown in FIG. 8, the compartment needles can also be provided with only one hook, it being noted that at least two of all the hooks are arranged opposite one another.
  • the invention is not limited to certain, e.g. circular hook shapes limited.
  • the recesses can also be profiled threads such as Be adapted to flat wires.

Abstract

2.1 The object of the invention consists in optimising the functional reliability of the thread separator by so constructing the gripper needles that the frontmost thread of a warp thread concatenation of a fabric is reliably seized in isolation on each occasion and that any risk of piercing and gripping the successive thread is avoided. 2.2 It is proposed to design the gripper needles (4) so that they are constructed as sectioned needles which are provided with special hooks (6) (7) of which at least two are arranged to oppose each other in the same or parallel plane with respect to the upper and lower sides of the strip of fabric associated with the line of thread, the points (10) (11) of the gripper needles being directed towards the respectively opposite thread surface (12) and the concave recesses (14) (15) of the gripper needles shaped to conform to the diameter of the thread to be picked up on separation in such a way that piercing by the needle points of the thread to be separated and gripping of the successive thread are avoidable. <IMAGE>

Description

Die Erfindung betrifft einen Fadentrenner für Nahtmaschi­nen, insbesondere zum Nahten von Entwässerungssieben, Trockensieben, Filzen u. dgl., mit einem Trennerkopf in einer zur Ebene der Reihe voneinander zu trennender Fäden des Siebgewebes im wesentlichen senkrechten Ebene, die in dieser Ebene bewegbar und gegen die Fadenreihe vorschieb­bar ist, mit einem die Fadenreihe hintergreifenden Schen­kel des Trennerkopfes, der einen Einlaufspalt für die Fa­denreihe aufweist und mit einer im Trennerkopf durch ei­nen steuerbaren Antrieb in bezug auf die Fadenreihe in einer Führungsnut verlagerbaren Greifernadel.The invention relates to a thread separator for sewing machines, in particular for sewing drainage fabrics, dryer fabrics, felting and the like. Like., With a separator head in a to the plane of the row to be separated threads of the screen fabric substantially perpendicular plane which is movable in this plane and can be pushed against the thread row, with a leg behind the thread row of the separator head, which has an inlet gap for the thread row has and with a in the separating head by a controllable drive with respect to the thread row in a guide groove displaceable needle.

Derartige bekannte Fadentrenner (DE-GM 81 22 450) werden zum Vereinzeln von Fäden bei der Nahtbildung zum Schlies­sen offen gewebter Gewebebahnen mittels Hilfskette benö­tigt, wobei die zu beiden Seiten der Hilfskette in einem Magazinierbund gehaltenen Kettfadenenden der Gewebebahn erfaßt und abwechselnd von beiden Seiten her in das in der Hilfskette gebildete Fach eingeführt werden. Eine Automa­tisierung des gesamten Nahtbildungsvorgangs setzt voraus, daß dieser Vorgang reibungslos abläuft insofern, als der Fadentrenner für das Vereinzeln der Kettfadenenden immer nur einen Faden erfaßt und von der Fadenreihe abrennt, und nicht mehrere, wobei dieses Erfassen auch mit Sicher­heit ausschließen muß, daß der abzutrennende Faden vom Fadentrenner aufgespießt wird.Known thread separators of this type (DE-GM 81 22 450) are required for separating threads in the seam formation for closing open woven fabric webs by means of an auxiliary chain, the warp thread ends of the fabric web held on both sides of the auxiliary chain being detected and alternately in from both sides the subject formed in the auxiliary chain are introduced. Automation of the entire seam formation process presupposes that this process runs smoothly insofar as the thread separator always separates the warp thread ends only one thread is gripped and severed from the row of threads, and not several, whereby this grasping must also exclude with certainty that the thread to be separated is impaled by the thread separator.

Der bekannte Fadentrenner erfüllt diese Forderungen nur unzulänglich, so daß die Aufgabe der Erfindung darin be­steht, die Funktionssicherheit des Fadentrenners dadurch zu optimieren, daß die Greifernadeln so ausgebildet sind, daß mit Sicherheit ein Vereinzeln des jeweils vordersten Fadens einer Längsfadenendenaufreihung eines Gewebes er­reicht wird und jegliches Anstechen und Mitnehmen des Folgefadens vermieden wird.The known thread separator fulfills these requirements only inadequately, so that the object of the invention is to optimize the functional reliability of the thread separator in that the hook needles are designed in such a way that a separation of the foremost thread in each case of a line of longitudinal thread ends of a fabric is achieved and all Piercing and taking away the following thread is avoided.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Greifernadeln als Abteilnadeln ausgebildet sind, die mit Haken versehen sind, von denen mindestens zwei in be­zug auf die Oberseite und die Unterseite des der Faden­reihe zugehörigen Gewebes einander in derselben Ebene oder parallelen Ebenen gegenüberliegen, deren Spitzen zur jeweils gegenüberliegenden Fadenoberfläche gerichtet sind und deren konkave Ausnehmungen in Anpassung an Durchmes­ser und Form der beim Abtrennen aufzunehmenden einzelnen Fäden so geformt sind, daß ein Anstechen des abzutrennen­den Fadens durch die Spitzen und ein Mitnehmen des Folge­fadens vermeidbar sind.This object is achieved in that the hook needles are designed as compartment needles, which are provided with hooks, of which at least two with respect to the top and the bottom of the fabric associated with the row of threads are opposite each other in the same plane or parallel planes, the tips of which each opposite thread surface are directed and their concave recesses are shaped to match the diameter and shape of the individual threads to be picked up in such a way that piercing of the thread to be separated by the tips and taking away the following thread can be avoided.

Durch diese Konstruktion wird erreicht, daß mit Hilfe ei­nes Hakensystems, bestehend aus mindestens zwei einander gegenüberliegenden, jeweils auf die abzutrennenden Fäden abgestimmten Haken der Abteilnadeln je nach Steuerung von der Laufseiten- oder Papierseitenrichtung kommend, der vorderste Kettfaden einer Fadenreihe ergriffen und ver­einzelt wird, wobei jeweils einer der Haken für jeweils eine bestimmte Fadensorte und/oder eine Seite des Gewebes zuständig ist.This construction ensures that with the aid of a hook system consisting of at least two opposing hooks of the compartment needles, each matched to the threads to be separated, depending on the control, coming from the running side or paper side direction, the foremost warp thread of a row of threads is gripped and separated, whereby one of the hooks is responsible for a particular type of thread and / or one side of the fabric.

Durch vorteilhafte Ausgestaltungen des Erfindungsvor­ schlags, die in den Unteransprüchen 2 bis 8 gekennzeich­net sind, lassen sich die Hakenkonturen und Kombinationen im Hinblick auf die Funktion der Abteilnadeln optimieren.By advantageous embodiments of the invention impact, which are characterized in subclaims 2 to 8, the hook contours and combinations can be optimized with regard to the function of the compartment needles.

Weitere vorteilhafte Ausgestaltungen nach den Unteran­sprüchen 9 bis 13 betreffen vorteilhafte Ausbildungen der Abteilnadeln und der Einlaufspaltbreite für verschie­dene Gewebearten sowie die Steuerung dieser Abteilnadeln.Further advantageous configurations according to subclaims 9 to 13 relate to advantageous configurations of the compartment needles and the inlet gap width for different types of fabric and the control of these compartment needles.

Die Erfindung wird nachfolgend anhand der in der Zeich­nung dargestellten Ausführungsbeispiele näher erläutert. In der Zeichnung zeigen:

  • Fig. 1 eine Längsschnittansicht eines Fadentrenners mit herkömmlicher Greifernadel,
  • Fig. 2 eine der Fig. 1 vergleichbare, jedoch schemati­sierte Längsschnittansicht eines Fadentrenners mit erfindungsgemäßer Abteilnadel,
  • Fig. 3 eine schematisierte Schnittansicht des Doppelha­kens einer erfindungsgemäßen Abteilnadel mit ver­einzeltem Faden im unteren Haken,
  • Fig. 4 eine der Fig. 3 vergleichbare, schematische An­sicht des erfindungsgemäßen Doppelhakens mit ver­einzeltem Faden im oberen Haken, und
  • Fig. 5 bis 8 schematisierte Teilseitenansichten bzw. Schrägansichten der erfindungsgemäßen Abteilna­deln mit unterschiedlichen Hakenkombinationen für unterschiedliche Gewebeformen, nämlich in der Aus­führungsform von Fig. 5 für ein Duoform-Gewebe, in den Ausführungsformen von Fig. 6 bis Fig. 8 für Gewebe mit mehreren verschiedenen Längsfadensyste­men, wobei in Fig. 8 die Nadeln eines Greifernadel­systems der besseren Verständlichkeit wegen ausein­andergerückt gezeichnet sind.
The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawing. The drawing shows:
  • 1 is a longitudinal sectional view of a thread separator with a conventional looper needle,
  • 2 shows a longitudinal sectional view, comparable to FIG. 1, of a thread separator with a section needle according to the invention,
  • 3 is a schematic sectional view of the double hook of a compartment needle according to the invention with a single thread in the lower hook,
  • Fig. 4 is a schematic view comparable to FIG. 3 of the double hook according to the invention with isolated thread in the upper hook, and
  • 5 to 8 schematic partial side views or oblique views of the compartment needles according to the invention with different hook combinations for different fabric shapes, namely in the embodiment of FIG. 5 for a duo-form fabric, in the embodiments of FIGS. 6 to 8 for fabrics with several different ones Longitudinal thread systems, in Fig. 8 the needles of a hook needle system are drawn apart for clarity.

Der in Fig. 1 dargestellte Fadentrenner ist bekannt. Er unterscheidet sich von dem in Fig. 2 dargestellten erfin­dungsgemäßen Fadentrenner im wesentlichen nur hinsicht­lich der einzigen Greifernadel mit nur einem Haken, so daß für die entsprechenden Teile des Fadentrenners wei­terer Ausführungsformen die gleichen Bezugszeichen ver­wendet werden. Der Fadentrenner 1 weist einen Trenner­kopf 2 auf, welcher in einer zur Ebene einer Reihe 9 von­einander zu trennender, also zu vereinzelnder Fäden 13 (Fig. 3 und 4) im wesentlichen senkrechten Ebene ange­ordnet ist und in dieser Ebene gegen die Fadenreihe ver­schiebbar ist.The thread separator shown in Fig. 1 is known. It differs from the thread separator according to the invention shown in FIG. 2 essentially only with regard to the single looper needle with only one hook, so that the same reference numerals are used for the corresponding parts of the thread separator of further embodiments. The thread separator 1 has a separator head 2, which is arranged in a thread 13 (FIGS. 3 and 4) which is to be separated from one another to the plane of a row 9, that is to say to be separated, in a substantially vertical plane and can be displaced in this plane against the thread row.

Im Trennerkopf 2 befindet sich mindestens eine durch ei­nen steuerbaren Antrieb in bezug auf die Fadenreihe ver­lagerbare, in einer Nut 3 des Trennerkopfes bewegbare, von einer Blattfeder 16 beaufschlagte Greifernadel, die als mit mindestens einem Haken 6, 7 versehene Abteilna­del 4 ausgebildet ist. Die Abteilnadel oder Abteilnadeln weisen mindestens zwei in bezug auf die Oberseite 5 und Unterseite 8 des der Fadenreihe 9 zugehörigen Gewebe­streifens bzw. Magazinierbundes einander in derselben Ebene gegenüberliegende Haken 6, 7 auf, deren Spitzen 10, 11 zur jeweils gegenüberliegenden Fadenoberfläche 12 gerichtet sind. Die Haken 6, 7 sind mit je einer konka­ven Ausnehmung 14, 15 versehen, die - wie aus den Figu­ren 2, 3 und 4 entnommen werden kann - in vorteilhaften Ausführungen in einer Abteilnadel liegen. Diese konkaven Ausnehmungen weisen einen Krümmungsradius auf, der der Krümmung der Oberfläche 12 des Fadens 13 entspricht, können also in Anpassung an den Durchmesser des beim Ab­trennen aufzunehmenden Fadens 13 auch verschieden ge­krümmt sein.In the separating head 2 there is at least one gripper needle which can be displaced by a controllable drive with respect to the thread row and which is movable in a groove 3 in the separating head and acted upon by a leaf spring 16 and which is designed as a section needle 4 provided with at least one hook 6, 7. The compartment needle or compartment needles have at least two hooks 6, 7 opposite each other in the same plane with respect to the top 5 and bottom 8 of the fabric strip or magazine bundle belonging to the thread row 9, the tips 10, 11 of which are directed towards the respective opposite thread surface 12. The hooks 6, 7 are each provided with a concave recess 14, 15, which - as can be seen from FIGS. 2, 3 and 4 - advantageously lie in a compartment needle. These concave recesses have a radius of curvature which corresponds to the curvature of the surface 12 of the thread 13, and can therefore also be curved differently to adapt to the diameter of the thread 13 to be picked up during separation.

Die Länge des Krümmungsbogens der konkaven Ausnehmungen 14, 15 der Haken 6, 7 entspricht bei kreisrundem Faden­querschnitt, wie er in den Fig. 3 und 4 dargestellt ist, in etwa der Hälfte des Fadenumfangs. In jedem Fall ist die Formgebung der Haken 6, 7 so gewählt, daß ein Anste­chen des abzutrennenden Fadens 13 durch die jeweilige Spitze 10, 11 und ein Mitnehmen des Folgefadens 18 ver­mieden werden.The length of the arc of curvature of the concave recesses 14, 15 of the hooks 6, 7 corresponds to approximately half the thread circumference in the case of a circular thread cross section, as shown in FIGS. 3 and 4. In any case the shape of the hooks 6, 7 is selected so that piercing of the thread 13 to be separated by the respective tip 10, 11 and entrainment of the follower thread 18 are avoided.

Zu diesem Zweck ist der gegenseitige Abstand der Spitzen 10, 11 der Haken 6, 7 so gewählt, wie aus Fig. 2 ersicht­lich, daß er etwa der Breite (a) des im Trennerkopf 2 vorhandenen Einlaufspaltes 17 für die Fadenreihe 9 ent­spricht. Diese Einlaufspaltbreite ist an die Gewebe­dicke angepaßt und liegt etwa zwischen 0,5 und 3 mm, wo­bei sich eine Breite von 1,0 mm als besonders vorteil­haft erwiesen hat. Neben der Einlaufspaltbreite ist für eine optimale Funktionsweise des Fadentrenners eine enge Führungsnut im Trennerkopf ohne gerundete Kanten vorteil­haft, so daß sich bei entsprechender Abstimmung der Kon-­figuration der Haken bzw. Abteilnadeln, der Führungsnut und der Einlaufspaltbreite sogar eine Spanndurckeinstel­lung des Gewebestreifens erübrigt, um die gewünschte Funktionssicherheit des Fadentrenners sicherzustellen, d.h., ein Anstechen und Mitnehmen des Folgefadens 18 beim Vereinzeln des Fadens 13 mit Sicherheit zu vermei­den. Somit können durch die erfindungsgemäße Verwendung einer z.B. mit einem Doppelhaken versehenen Abteilnadel innerhalb des Fadentrenners Webfehler in der Naht durch gleichzeitiges Einschlagen zweier Fäden vermieden werden.For this purpose, the mutual spacing of the tips 10, 11 of the hooks 6, 7 is selected as shown in FIG. 2 that it corresponds approximately to the width (a) of the inlet gap 17 in the separating head 2 for the thread row 9. This inlet gap width is adapted to the fabric thickness and is approximately between 0.5 and 3 mm, a width of 1.0 mm having proven to be particularly advantageous. In addition to the inlet gap width, a narrow guide groove in the separator head without rounded edges is advantageous for optimal functioning of the thread separator, so that with appropriate adjustment of the configuration of the hooks or compartment needles, the guide groove and the inlet gap width, a tension adjustment of the fabric strip is unnecessary, by which to ensure the desired functional reliability of the thread separator, ie to avoid piercing and taking along the subsequent thread 18 when separating the thread 13 with certainty. Thus, by using a e.g. compartment needle with a double hook inside the thread separator prevents weaving errors in the seam by simultaneously twisting two threads.

In den Figuren 5 bis 7 ist schematisch anhand einer Teil­seitenansicht einer erfindungsgemäßen Abteilnadel 4 mit ihrem Doppelhaken dargestellt, in welcher Weise die Na­del das Vereinzeln der Fäden bei verschiedenen Gewebear­ten durchführt.FIGS. 5 to 7 schematically show, using a partial side view of a compartment needle 4 according to the invention with its double hook, the manner in which the needle separates the threads in different types of fabric.

Bei der Verwendung der Abteilnadel für Duoform-Gewebe sind die beiden in den Fig. 2 bis 4 mit 6 und 7 gekenn­zeichneten, jedoch in den Fig. 5 bis 7 nicht näher be­zeichneten Haken der Nadel größenmäßig an die jeweiligen Kettfadendurchmesser angepaßt und ergreifen den je nach Steuerung von der Laufseiten- und Papierseitenrichtung herkommend vordersten Kettfaden, um ihn zu vereinzeln. Die Steuerung der Abteilnadeln 4 erfolgt dabei über eine programmierte Kurvenscheibe im Programmschaltwerk bzw. beim Jacquard-Nahten über Programm-Nadeln und die entsprechend programmierte Jacquard-Karte. Die Ziffern 1 bis 7 (Fig. 5), 1 bis 10 (Fig. 6) und 1 bis 9 (Fig. 7) und deren Seitenzuordnung zeigen die Reihen­folge und die Seitenzugehörigkeit der durch die Haken erfolgenden Abgriffe. So wird bei dem Duoform-Gewebe gemäß Fig. 5 der linke oder untere Haken der Abteil­nadel 4 dazu benötigt, die Kettfäden 2, 3, 5 und 7 auf der Papierseite des Gewebes zu vereinzeln, während der rechte, obere Haken der Abteilnadel die Kettfäden 1, 4 und 6 auf der Laufseite des Gewebes vereinzelt. Dabei ist zu erkennen, daß bei diesem Gewebe, dem sogenannten F-23-Gewebe, der zweite und dritte Kettfaden auf der Papierseite aufeinanderfolgend und alle übrigen im Wechsel zwischen Laufseite und Papierseite vereinzelt bzw. abgegriffen werden. Die Funktionsweise des er­findungsgemäßen Fadentrenners bzw. der in ihm ver­wendeten Abteilnadel 4 mit Doppelhaken beim Vereinzeln von Fäden eines Verbundgewebes ist in Fig. 6 darge­stellt. Hierbei wird im Wechsel die Papierseite und die Laufseite des Gewebes von dem unteren bzw. oberen Haken abgegriffen. Für ein anderes Verbundgewebe ge­schieht, wie aus Fig. 7 ersichtlich, die Vereinzelung der Kettfäden im Wechsel Papierseite, Papierseite und Laufseite des Gewebes, wobei mit einem kleinen Haken für die Papierseite und einem großen Haken für die Lauf­seite gearbeitet wird, wie aus den unterschiedlichen Durchmessern der im Schnitt dargestellten Fäden der Papierseite und Laufseite und auch aus den unter­schiedlichen Hakengrößen des Doppelhakens dieser Abteil­nadel ersichtlich ist.When using the compartment needle for duo-form fabrics, the two hooks of the needle marked in FIGS. 2 to 4 with 6 and 7 but not shown in FIGS. 5 to 7 are adapted in size to the respective warp thread diameters and take this depending on Control from the leading side and paper side direction of the front warp thread to separate it. The compartment needles 4 are controlled via a programmed cam disc in the program switching mechanism or, in the case of jacquard seams, via program needles and the correspondingly programmed jacquard card. The digits 1 to 7 (Fig. 5), 1 to 10 (Fig. 6) and 1 to 9 (Fig. 7) and their page assignment show the order and the page affiliation of the taps made by the hooks. 5, the left or lower hook of the section needle 4 is required to separate the warp threads 2, 3, 5 and 7 on the paper side of the fabric, while the right, upper hook of the section needle the warp threads 1 , 4 and 6 isolated on the running side of the fabric. It can be seen that in this fabric, the so-called F-23 fabric, the second and third warp threads on the paper side are consecutive and all others are alternately picked up or tapped alternately between the running side and the paper side. The mode of operation of the thread separator according to the invention or the compartment needle 4 with double hook used in separating threads of a composite fabric is shown in FIG. 6. Here, the paper side and the running side of the fabric are picked up alternately by the lower and upper hook. For another composite fabric, as can be seen from FIG. 7, the warp threads are separated in alternation between paper side, paper side and running side of the fabric, working with a small hook for the paper side and a large hook for the running side, as from the different diameters the threads of the paper side and the running side shown in section and also from the different hook sizes of the double hook of this compartment needle can be seen.

Die erfindungsgemäße Konstruktion hat darüberhinaus den Vorteil, daß die Abteilnadel 4 in jeden Standard-­Fadentrenner paßt bzw. jeder derartige Fadentrenner mit einem nur geringen Aufwand diesbezüglich nachge­rüstet werden kann. Darüberhinaus führt die Funktions­verbesserung nicht nur dazu, daß das gleichzeitige Vereinzeln zweier aufeinanderfolgender Fäden ver­mieden wird, sondern auch, daß die Einstellung des Fadentrenners vereinfacht wird.The construction according to the invention also has the advantage that the dividing needle 4 fits into any standard thread separator or that each such thread separator can be retrofitted with little effort in this regard. In addition, the functional improvement not only means that the simultaneous separation of two successive threads is avoided, but also that the setting of the thread separator is simplified.

Es ist bei vielen Geweben ausreichend, mit einer einzigen Abteilnadel im Trennerkopf zu arbeiten, deren gegenüberliegende Haken abhängig vom Gewebe geformt sind. Bei Geweben mit mehreren unterschiedlich dicken Längsfaden-Sorten kann es jedoch notwendig sein, mehrere Abteilnadeln übereinander in der Führungsnut des Trennerkopfes anzuordnen, wobei jede Nadel einzeln bewegbar ist und einem Steuerungs-Programm folgend jeweils die Fäden der ihr zugeordneten Fadensorte abteilt. Wie Fig. 8 zeigt, können die Abteilnadeln auch mit nur einem Haken versehen sein, wobei zu beachten ist, daß von allen Haken wenigstens zwei gegenüber­liegend angeordnet sind.For many fabrics, it is sufficient to work with a single section needle in the separator head, the opposite hooks of which are shaped depending on the fabric. In the case of fabrics with several types of longitudinal thread of different thicknesses, however, it may be necessary to arrange a plurality of section needles one above the other in the guide groove of the separating head, each needle being individually movable and, according to a control program, dividing the threads of the thread types assigned to them. As shown in FIG. 8, the compartment needles can also be provided with only one hook, it being noted that at least two of all the hooks are arranged opposite one another.

Es wird noch darauf hingewiesen, daß sich die Erfindung nicht auf bestimmte, z.B. kreisförmige Hakenformen beschränkt. Selbstverständlich können die Ausnehmungen auch Profilfäden wie z.B. Flachdrähten angepaßt sein.It should be noted that the invention is not limited to certain, e.g. circular hook shapes limited. Of course, the recesses can also be profiled threads such as Be adapted to flat wires.

Claims (13)

1. Fadentrenner für Nahtmaschinen, insbesondere zum Nahten von Entwässerungssieben, Trockensieben, Filzen u. dgl., mit einem Trennerkopf in einer zur Ebene der Reihe voneinander zu trennenden Fäden eines Gewebestrei­fens im wesentlichen senkrechten Ebene, der in dieser Ebene bewegbar und gegen die Fadenreihe verschiebbar ist, mit einem die Fadenreihe hintergreifenden Schenkel des Trennerkopfes, der einen Einlaufspalt für die Fadenreihe aufweist und mit mindestens einer im Trennerkopf durch einen steuerbaren Antrieb in einer Führungsnut in Bezug auf die Fadenreihe verlagerbaren Greifernadel, dadurch gekennzeichnet, daß die Greifernadeln als Abteilnadeln (4) ausgebildet sind, die mit Haken versehen sind, von denen wenigstens zwei (6, 7) in Be­zug auf die Oberseite (5) und die Unterseite (8) des die Fadenreihe bildenden Gewebestreifens bzw. Magazi­nierbundes einander gegenüberliegen, wobei die Spitzen (10, 11) der Haken zur jeweils gegenüberliegenden Faden­oberfläche (12) des abzutrennenden Fadens (13) gerichtet sind und die konkaven Ausnehmungen (14, 15) der Haken an Durchmesser und/oder Form des beim Abtrennen aufzunehmen­den Fadens angepaßt sind.1. Thread separator for sewing machines, especially for sewing drainage fabrics, dryer fabrics, felting and the like. Like., With a separator head in a to be separated from the plane of the row of threads of a fabric strip substantially perpendicular plane, which is movable in this plane and displaceable against the thread row, with a leg behind the thread row of the separator head, which has an inlet gap for the thread row and with at least one gripper needle which can be displaced in the guide groove in relation to the thread row in the guide head by a controllable drive, characterized in that the gripper needles are designed as section needles (4) which are provided with hooks, at least two of which (6, 7 ) with respect to the top (5) and the bottom (8) of the fabric strip or magazin bundle forming the thread row lie opposite one another, the tips (10, 11) of the hooks being directed towards the respective opposite thread surface (12) of the thread (13) to be separated are and the concave recesses (14, 15) of the hook on the diameter and / or shape of the b e adapted to be picked up thread. 2. Fadentrenner nach Anspruch 1, dadurch gekenn­zeichnet, daß sich die mindestens zwei gegen­überliegenden Haken (6, 7) in verschiedenen Abteilnadeln (4) befinden.2. Thread separator according to claim 1, characterized in that the at least two opposite hooks (6, 7) are in different compartment needles (4). 3. Fadentrenner nach Anspruch 1, dadurch gekenn­zeichnet, daß mindestens eine Abteilnadel (4) mit zwei gegenüberliegenden Haken (6, 7) ausgestattet ist.3. Thread separator according to claim 1, characterized in that at least one section needle (4) is equipped with two opposing hooks (6, 7). 4. Fadentrenner nach Anspruch 1 und 3, dadurch ge­kennzeichnet, daß der Fadentrenner nur eine Abteilnadel (4) enthält.4. Thread separator according to claim 1 and 3, characterized in that the thread separator contains only one compartment needle (4). 5. Fadentrenner nach einem der Ansprüche 1 bis 4, da­durch gekennzeichnet, daß die konkaven Ausnehmungen (14, 15) der Haken (6, 7) einen Krümmungs­radius aufweisen, der in etwa der Krümmung der Oberfläche (12) des Fadens (13) entspricht.5. Thread separator according to one of claims 1 to 4, characterized in that the concave recesses (14, 15) of the hooks (6, 7) have a radius of curvature which corresponds approximately to the curvature of the surface (12) of the thread (13) . 6. Fadentrenner nach einem der Ansprüche 1 bis 5, da­durch gekennzeichnet, daß mindestens zwei Ausnehmungen (14, 15) der Haken (6, 7) gleiche Krüm­mungsradien aufweisen.6. Thread separator according to one of claims 1 to 5, characterized in that at least two recesses (14, 15) of the hooks (6, 7) have the same radii of curvature. 7. Fadentrenner nach einem der Ansprüche 1 bis 5, da­durch gekennzeichnet, daß mindestens zwei Ausnehmungen (14, 15) der Haken (6, 7) unterschied­liche Krümmungsradien aufweisen.7. Thread separator according to one of claims 1 to 5, characterized in that at least two recesses (14, 15) of the hooks (6, 7) have different radii of curvature. 8. Fadentrenner nach einem der Ansprüche 1 bis 7, da­durch gekennzeichnet, daß die Länge der Krümmungsbögen der konkaven Ausnehmungen (14, 15) der Ha­ken (6, 7) bei kreisrunden Fadenquerschnitten etwa der Hälfte des Fadenumfangs entspricht.8. Thread separator according to one of claims 1 to 7, characterized in that the length of the curves of the concave recesses (14, 15) of the hooks (6, 7) corresponds to approximately half of the thread circumference with circular thread cross sections. 9. Fadentrenner nach einem der Ansprüche 1 bis 8, da­durch gekennzeichnet, daß der gegensei­tige Abstand der Spitzen (10, 11) der Haken (6, 7) minde­ stens so groß wie die Breite (a) des Einlaufspaltes (17) ist.9. Thread separator according to one of claims 1 to 8, characterized in that the mutual spacing of the tips (10, 11) of the hooks (6, 7) minde least as large as the width (a) of the inlet gap (17). 10. Fadentrenner nach einem der Ansprüche 1 bis 9, da­durch gekennzeichnet, daß die Steuerung der Abteilnadeln (4) mittels einer programmierten Kurven­scheibe durch ein Programmschaltwerk erfolgt.10. Thread separator according to one of claims 1 to 9, characterized in that the control of the section needles (4) is carried out by means of a programmed cam by a program switching mechanism. 11. Fadentrenner nach einem der Ansprüche 1 bis 9, da­durch gekennzeichnet, daß die Steuerung der Abteilnadeln (4) über eine Abtasteinrichtung erfolgt, die durch eine entsprechende programmierte Jacquard-Karte aktiviert wird.11. Thread separator according to one of claims 1 to 9, characterized in that the control of the compartment needles (4) takes place via a scanning device which is activated by a corresponding programmed jacquard card. 12. Fadentrenner nach einem der Ansprüche 1 bis 11, da­durch gekennzeichnet, daß die Breite (a) des Einlaufspaltes (17) 0,5 mm größer ist als die Dicke des Gewebestreifens.12. Thread separator according to one of claims 1 to 11, characterized in that the width (a) of the inlet gap (17) is 0.5 mm larger than the thickness of the fabric strip. 13. Fadentrenner nach einem der Ansprüche 1 bis 12, gekennzeichnet durch mehrere übereinander angeordnete Abteilnadeln (4), deren Haken (6, 7) an un­terschiedliche Fadendurchmesser des Gewebes angepaßt sind und von verschiedenen Antriebselementen des steuer­baren Antriebs bewegbar sind.13. Thread separator according to one of claims 1 to 12, characterized by a plurality of stacking needles (4) arranged one above the other, the hooks (6, 7) of which are adapted to different thread diameters of the fabric and can be moved by different drive elements of the controllable drive.
EP87106666A 1987-05-07 1987-05-07 Seaming machines, especially for seaming dewatering and dry screens, felts and the like Expired - Lifetime EP0289640B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES198787106666T ES2025577T3 (en) 1987-05-07 1987-05-07 WIRE SEPARATOR FOR SEWING MACHINES, ESPECIALLY FOR SEWING DRAIN SCREENS, DRYING SCREENS, FELTS AND LIKE.
AT87106666T ATE68024T1 (en) 1987-05-07 1987-05-07 THREAD BREAKER FOR SEWING MACHINES, ESPECIALLY FOR SEWING DEWATERING FABRICS, DRYING FABRICS, FELTING ETC.
DE8787106666T DE3773487D1 (en) 1987-05-07 1987-05-07 THREAD SEPARATOR FOR SEAMING MACHINES, ESPECIALLY FOR SEAMING DRAINAGE SCREENS, DRY SCREENS, FELTS AND THE LIKE
EP87106666A EP0289640B1 (en) 1987-05-07 1987-05-07 Seaming machines, especially for seaming dewatering and dry screens, felts and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87106666A EP0289640B1 (en) 1987-05-07 1987-05-07 Seaming machines, especially for seaming dewatering and dry screens, felts and the like

Publications (2)

Publication Number Publication Date
EP0289640A1 true EP0289640A1 (en) 1988-11-09
EP0289640B1 EP0289640B1 (en) 1991-10-02

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EP87106666A Expired - Lifetime EP0289640B1 (en) 1987-05-07 1987-05-07 Seaming machines, especially for seaming dewatering and dry screens, felts and the like

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AT (1) ATE68024T1 (en)
DE (1) DE3773487D1 (en)
ES (1) ES2025577T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388880A1 (en) * 1989-03-20 1990-09-26 NOVATECH GmbH Siebe und Technologie für Papier Separator for seaming machines
EP0444587A1 (en) * 1990-02-26 1991-09-04 NOVATECH GmbH Siebe und Technologie für Papier Hook and separator containing such hook to pick up and isolate threads
WO2005090663A1 (en) * 2004-03-19 2005-09-29 Wangner Gmbh & Co. Kg Plate for the separator of a seam weaving machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043441A1 (en) * 1980-07-09 1982-01-13 Hermann Wangner GmbH &amp; Co. KG Process and apparatus for making a woven seam between two ends of a fabric
US4581794A (en) * 1984-03-07 1986-04-15 Asten Group Inc. Automatic seaming machine for fabric belts

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8122450U1 (en) * 1981-07-30 1983-01-13 Fa. F. Oberdorfer, 7920 Heidenheim DEVICE FOR CONTINUOUSLY DIVIDING THREADS MAINTAINED

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043441A1 (en) * 1980-07-09 1982-01-13 Hermann Wangner GmbH &amp; Co. KG Process and apparatus for making a woven seam between two ends of a fabric
US4581794A (en) * 1984-03-07 1986-04-15 Asten Group Inc. Automatic seaming machine for fabric belts
US4581794B1 (en) * 1984-03-07 1989-01-03

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388880A1 (en) * 1989-03-20 1990-09-26 NOVATECH GmbH Siebe und Technologie für Papier Separator for seaming machines
EP0444587A1 (en) * 1990-02-26 1991-09-04 NOVATECH GmbH Siebe und Technologie für Papier Hook and separator containing such hook to pick up and isolate threads
WO2005090663A1 (en) * 2004-03-19 2005-09-29 Wangner Gmbh & Co. Kg Plate for the separator of a seam weaving machine

Also Published As

Publication number Publication date
ATE68024T1 (en) 1991-10-15
ES2025577T3 (en) 1992-04-01
DE3773487D1 (en) 1991-11-07
EP0289640B1 (en) 1991-10-02

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